nchash

A C-utility for hashing NetCDF variables

Dependencies

C compiler (clang for MacOS)
libarchive
libnetcdf
libcrypto

Installation Instructions

autoreconf -i
./configure --prefix=<your install dir>
make
make install

Note for Anaconda Users

If you are using libraries from Anaconda, the recommendation is to use the shared libraries from the conda environment. Use the following options to ./configure:

./configure CFLAGS=-I/${CONDA_PREFIX}/include LDFLAGS="-L/${CONDA_PREFIX}/lib -Wl,-rpath,$CONDA_PREFIX/lib"

Usage Instructions

nchash <options> file

Options:
-c     Colorized output
-h     Hash algorithm 'md5', 'sha1', or 'sha256' (default)
file   Either a NetCDF file or a tar file that contains multiple NetCDF files

Example

nchash -h md5 ocean_hgrid.nc
ocean_hgrid.nc tile: 93fa583c304560eb25b156a9f7368c70
ocean_hgrid.nc y: 88ee0026c1e6315441c63fe6e7772199
ocean_hgrid.nc x: 0d4bd34bb1afd4346fd4a9e80bea354a
ocean_hgrid.nc dy: 5a8fe9eedc30d99a6b745e02e7b5b6c3
ocean_hgrid.nc dx: 813f488487ca2308fe370588d5b38f45
ocean_hgrid.nc area: f1797c67c6af7d1334689f6e14dda51a
ocean_hgrid.nc angle_dx: 2ca36fcbdede94f70b0a8371e97fe98f

To-Do

Package for distribution via Anaconda cloud / conda-forge

Acknowledgements

StackOverflow and ChatGPT contributed significantly to this effort.